20 hp intek will only run as long as pour gas in carb, tried 2 other carbs, with same result.

blow air back threw the line towards the tank you have something clogging it or you forgot to turn the fuel on

carb needle valve stuck open clean carb possible bad float dont run with gas in oil

How long does it run before it quits?

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Check fuel lines for clogging.Thanks for asking and I hope this helps out.Please leave me 4 thumbs up.

I would take the bowl off the bottom of the carb.. Probably you have clogged up holes that let the gas into the bowl.Or either the needle is stuck up not allowing the gas to flow...That's why pouring gas in carbs would let it run for s few seconds....Also try fresh gas..Gas doesn't have led in it anymore..It don't last year from year...After grass season is over..Buy some from Lowe's or home depot..Pour it into your tank and let the motor run to get it done into the carburetor...Then the next year it will start

I took the carb apart and found that it needed rebuilt, I installed the new carb and fuel pump kit and it runs great again.

if gas is in the oil the needle and seat in the carb are bad or some thing in it. the gas will go in to the crank case and load the cylinder with gas. you can take the carb apart to see if something is in the seat. or replace the carb

sounds like you sucked up dirt in the carb needs to be taken off and cleaned

What year, model and engine type is your car? I never advocate pouring gas in the carb as bad things can happen as a result.

Sounds like you have a float problem their is a needle and seat the lets gas into bowl of carburetor if its bad it will not stop letting fuel in the carburetor causing your problem (Be sure to change oil before ing engine over or you could damage engine (with this problem you get gas into case which will remove oil from engine parts inside !